diff --git a/client/jsFiles/SEAWebClientMain.js b/client/jsFiles/SEAWebClientMain.js
index 5875c07..f6d9849 100644
--- a/client/jsFiles/SEAWebClientMain.js
+++ b/client/jsFiles/SEAWebClientMain.js
@@ -84,6 +84,7 @@ if (window.instrument) {
     let args = '';
     if (window.stream) { args += "&stream=" + window.stream; }
     if (window.device) { args += "&device=" + window.device; }
+    if (window.hideRightPart) { args += "&history_only=1"; }
     window.clientTags = args;
 }
 
diff --git a/webserver.py b/webserver.py
index 5270609..fea0f14 100755
--- a/webserver.py
+++ b/webserver.py
@@ -91,9 +91,13 @@ class Server:
             tags['device'] = devices[0] if len(devices) == 1 else devices
         return streams, tags, ','.join(device_names)
 
-    def register_client(self, instrument=None, stream=None, device=None):
+    def register_client(self, instrument=None, stream=None, device=None, history_only='0'):
         streams, tags, device_name = self.lookup_streams(instrument, stream, device)
-        client = self.client_cls(self, streams, instrument or '', device_name)
+        if history_only != '0':
+            # create dummy client
+            client = self.client_cls(self, [], '', '')
+        else:
+            client = self.client_cls(self, streams, instrument or '', device_name)
         history = self.history_cls(self, instrument, device_name, tags)
         # history.db.debug = True
         # all relevant methods of the history instance are saved in client.handlers
@@ -142,7 +146,7 @@ pollinterval = 0.2
 @app.route('/update')
 def get_update(_=None):
     # Client Adress: socket.getfqdn(flask.request.remote_addr)
-    kwargs = {k: flask.request.values.get(k) for k in ('instrument', 'stream', 'device')}
+    kwargs = {k: flask.request.values.get(k) for k in ('instrument', 'stream', 'device', 'history_only')}
 
     client = server.register_client(**kwargs)
     client.remote_info = circularlog.strtm() + " " + socket.getfqdn(flask.request.remote_addr.split(':')[-1])
@@ -352,11 +356,16 @@ a {
 </style></head>
 <body><table>
 ''']
-    showtitle = 0
     ONEMONTH = 30 * 24 * 3600
 
-    def title(text):
-        out.append(f'<tr><td colspan=2><h3>{text}</h3></td></tr>')
+    prevtitle = [None]
+
+    def change_title(text):
+        if text == prevtitle[0]:
+            return False
+        prevtitle[0] = text
+        out.append(f'<tr><td colspan=3><b>{text}</b></td></tr>')
+        return True
 
     # TODO: sort this by (instrument / device) and list dates
     # period format: Ymd..Ymd, Ymd (single date), Ymd..now, HM..now
@@ -379,36 +388,41 @@ a {
         for end, beg, key, devices in chunk_list:
             today, begdate, enddate = (time.strftime("%Y-%m-%d", time.localtime(t)) for t in (now, beg, end))
             port = None
-            host = ''
-            if key[0] == 'instrument': 
+            if key[0] == 'instrument':
                 ins = key[1]
                 port = instruments.get(ins)
-            if port is None:
-                args = ['='.join(key)]
-            else:
-                host = f'http://{ins}.psi.ch:{port}'
-                args = []
+            args = ['='.join(key)]
+            remote = None if port is None else f'http://{ins}.psi.ch:{port}'
+            history_only = bool(remote)
             if end > now:
                 if begdate == today:
                     daterange = f'since {time.strftime("%H:%M", time.localtime(beg))}'
                 else:
                     daterange = f'since {begdate}'
-                if showtitle == 0:
-                    title('currently running')
-                    showtitle = 1
+                if change_title('currently running'):
+                    out.append('<tr><td>instrument</td><td>history only</td><td></td></tr>')
             else:
+                history_only = True
+                remote = None
                 daterange = begdate if begdate == enddate else f'{begdate}...{enddate}'
-                if end < now - ONEMONTH:
-                    if showtitle == 1:
-                        title('older than 30 days')
-                        showtitle = 2
-
-            out.append(f'<tr><th><a href="{host}/?{"&".join(args)}">{key[1]} / {" ".join(devices)}</a></th>')
+                if end > now - ONEMONTH:
+                    change_title('recently running')
+                else:
+                    change_title('older than 30 days')
+            if history_only:
+                args.append('hr=1')
+            link = f'<a href="/?{"&".join(args)}">'
+            label = " ".join(devices)
+            if remote:
+                out.append(f'<tr><th><a href="{remote}">{ins.upper()}</a></th><th>{link}{label}</a></th>')
+            else:
+                out.append(f'<tr><th colspan=2>{link}{key[1]}&nbsp;{label}</a></th>')
             out.append(f'<td>{daterange}</td></tr>')
         if timerange:
             out.append(f'<h3><a href="/select_experiment?time=all">earlier dates</a></h3><br>')
         out.append('</table>')
-        out.append('<h3><a href="http://linse-c.psi.ch:8888/">central server</a></h3>')
+        if server.db.has_local:
+            out.append('<h3><a href="http://linse-c.psi.ch:8888/">central server</a></h3>')
         out.append('<h3>direct link to instruments:</h3>')
         out.extend([f'<a href="http://{ins}.psi.ch:{port}/">{ins.upper()}</a>&nbsp;\n'
                     for ins, port in instruments.items()])

{key[1]} / {" ".join(devices)}
{text}
{text}
instrument	history only
{ins.upper()}	{link}{label}
{link}{key[1]} {label}		{daterange}